The answer to your question is,
$3.84, you take $69.20 and divide it by 18 and there is your answer!
-Mabel <3
Correct Ans:Option A. 0.0100
Solution:We are to find the probability that the class average for 10 selected classes is greater than 90. This involves the utilization of standard normal distribution.
First step will be to convert the given score into z score for given mean, standard deviation and sample size and then use that z score to find the said probability. So converting the value to z score:

So, 90 converted to z score for given data is 2.326. Now using the z-table we are to find the probability of z score to be greater than 2.326. The probability comes out to be 0.01.
Therefore, there is a 0.01 probability of the class average to be greater than 90 for the 10 classes.
Answer:
ok nice to know
Step-by-step explanation:
that wasnt even a ????
Three diagonals can be drawn in a hexagon mmyyy dude.